Esplanade Sandstone

Early Permian - 315 million years
(age used by National Park Service;
Mathis and Bowman, 2005)

Geologic Province:
Plateau sedimentary province*

Areal Extent:
AZ(n)*

Type Locality:
Not designated (White, 1929).

Unit Name History:
First used (White, 1929). Revised, raised in rank from member to formation
of Supai Group (McKee, 1975). Overview (Billingsley, 1978). Areal limits,
name used in Grand Canyon region of northwest AZ; Overview (Billingsley,
1997).

Description from Grand Canyon Area (from Billingsley, George H., 2000)